JPS62184279A - Multipurpose flowout valve gear - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a drain pipe valve device or a discharge regulating type valve device for a gaseous fluid line. - [Prior Art] Various types of valves have been used in the past for gaseous fluid lines, and have different functions depending on the type.

However, the common feature of all these valves is that in one position they maintain the tightness of the valve installation and in the other position they protect against the surrounding medium or other conduits of different characteristics and above all at different pressures. and to ensure a more or less regulated automatic coupling.

In fact, there are several types that can be grouped according to the position of the shutter and valve element relative to the valve seat, the direction of movement of the shutter and the flow path when the valve opens, as well as the adjustment means.

The first group of valves is of the internal bearing surface type, the valve element being located inside the conduit relative to the valve seat and opened by movement inside the conduit.

The second group is of the type with an external bearing surface, in which the valve element is located on the outside of the conduit with respect to the valve seat and is opened by outward movement.

A major flaw in these valves is that when the valve opens, the flow of gaseous fluid is limited to the flow path between the valve seat and the valve element, the surface-to-surface flow path that the valve uses to close and seal. It is primarily limited by dimensions.

As a result, deterioration appears on the surface at a relatively early stage due to the nature of the gas itself, its temperature, solid particles contained or supported by the gas, or simply flow conditions that tend to cause agitation problems.

There are other types of valves that differ in that the movement of the valve element is not a linear movement along the axis of the device, but also raises the valve element by pivoting in such a way as to completely clear the fluid flow path. Although this is an improvement in the outflow action, it does not solve the problem of restricting fluid flow by sealing the faces during the outflow adjustment action, and distribution adjustment is always done by sealing both sides of the valve element and valve seat. This is done by adjusting the

Additionally, whatever type of valve is used requires periodic replacement of the sealing elements and fittings used to seal the valve elements. With conventional valves, this maintenance work is performed while the valve is open, which can come into contact with the gas in the line and is therefore difficult and dangerous.

[Problem that the invention seeks to solve]

The aim of the valve arrangement according to the invention is to at least alleviate, if not completely eliminate, the above-mentioned disadvantages and instead offer the advantages detailed below.

[Means for solving problems]

The valve device of the invention includes a valve element movable relative to the axis of the device inside the valve body provided with a sealing seat, the face of the valve element extending the region located upstream of the device. The air can be placed on the sealed seat in such a way that it is strictly isolated from other areas located downstream. Additionally, the device includes valve adjustment means designed to move and hold the valve element in position.

According to the invention, the device further includes a second seat located opposite the sealing seat, the valve element being selectively adjusted by the adjustment means to seal the device and the line in which it is installed. In addition to the position in which the bearing surface of the valve element rests on the sealing seat, the valve element has two positions so as to provide maximum flow division between the valve element and the valve body for line outflow. It is possible to occupy an intermediate position between the seats, in which the other side of the fluid valve cooperates with the second seat, the valve element being in the intermediate position and the valve element being in the second seat. It is held in a selected position between the overlying positions to restrict the flow section between the valve element and the second seat, thus regulating the discharge of the conduit.

In particular, the device has a vertical axis and the sealing seat can be placed on the side furthest from the conduit, called the upper seat. In this case, the second seat is located on the side closest to the conduit and is called the lower seat. The valve element can also be adjusted to rest on said lower seat, thus sealing said lower seat from the conduit.

In fact, the valve arrangement according to the invention is versatile, and each position of the valve element between the two seats determines a special function.

a) Sealing function when the valve element rests on the upper seat.

b) Outflow function when the valve element is in an intermediate position between the upper seat and the lower seat.

C) the valve element is at an adjusted distance from the lower seat;
Regulated evacuation function when held by regulating means.

The valve element also assumes a fourth or so-called "safe" position when resting on the lower seat.

The structure of the valve element with two bearing surfaces is designed to separate the different functions that the valve device is to accomplish. In fact, the upper part of the valve element and the upper seat are intended to ensure airtightness when the valve element rests on the upper seat, and stop their function when the valve is in the outflow or regulated discharge position. be done.

Particularly in this last adjusted discharge position, the flow section of the gaseous fluid is determined by the distance existing between the lower seat and the valve element.

Indeed, since the valve element is located between an intermediate position that leaves a flow segment that roughly coincides with the lower seat position and the upper seat position, and a position that rests on the lower seat, the flow segment between the valve element and the upper seat is larger than that of the elements and inferior zama.

In this last regulating distribution position, the flow of the gaseous fluid is limited by the smallest flow section, i.e. between the valve element and the lower seat, and it is at this point that deterioration phenomena, particularly due to wear and high temperatures, become noticeable. It is in this area where there is a rapid flow, while the flow in the upper seat area is slowed down and the bearing surfaces, which remain airtight, are protected and extend the service life.

In the outflow position, the valve element is in an intermediate position approximately equidistant from the lower and upper seats, so that the flow section between the valve body and the valve element is maximum and the pressure loss as the gas flows is minimal.

Finally, in the safe position of the valve, i.e. when the valve rests on the lower seat, it is not intended to provide a perfect airtightness to the pipeline, but mainly to the sealing surface of the upper chamber and the valve element, such as the replacement of the sealing body. maintenance intervention is possible and maintenance personnel are protected from gaseous fumes from the pipeline. Improvements in such maintenance conditions and the small amount of gas leakage remaining between the valve element and the lower seat can be achieved by providing a water joint at the joint position of the valve and the seat.

[Examples and effects]

The invention will be described in further detail with reference to the accompanying drawings.

Referring first to FIG. 1, the figure shows two male truncated sections 21. rotated in opposite directions and joined at the point of maximum diameter.
2 shows a valve device comprising a biconical valve element 2 with 22, which valve element 2 is movable along an axis between the upper chamber 11 and the lower part 12 of the valve body 1. These seats 11, 12 are also truncated, the conical shape of which is substantially equal to the conical shape of the corresponding truncated portions 21, 22 of the valve element 2 and likewise connected by a maximum diameter.

In the example of FIG. 1, the truncated parts 21.22 of the valve 2 are interconnected by a cylindrical part, and the truncated seats 11.12 are also interconnected by a cylindrical part. The parts of the valve element 2 and the valve body 1 are arranged so that when the valve element is in the discharge position, the valve body 1 and the valve element 2
sized and configured to ensure adequate flow division between and relative to the conduit in which the device is installed. This flow section is preferably at least equal to the surface connecting the valve device to the line, so that no flow restriction occurs inside the device body.
There is no such thing.

Furthermore, the configuration of the valve body 1 and the biconical valve element 2 is configured to facilitate the discharge of gaseous fluid and thus to minimize the possibility of pressure losses. For this effect, a conical portion 23 joined to the smallest diameter of the truncated portion 22 of the valve element 2 is advantageously provided in the lower part of the valve element 2, the tip of the conical portion 23 being located inside the fluid conduit. suitable for

To enable the placement and removal of the valve element 2, the valve body 1 is
The part of the device that is composed of two parts and is close to the conduit is joined to the conduit through airtight means such as flanges and joints. This part essentially consists of the lower part 12 and the cylindrical part of the valve body 1. The second part is constituted by an upper chamber clamped to the valve body 1 by a flange 3, the inner dimension at the location of the flange 3 being such as to allow the passage of the valve element 2 during its placement and removal. The dimensions are as follows.

The valve device further includes adjustment means for regulating the axial displacement of the device and the positioning of the valve element 2. The adjustment means consists of a fixed part connected to the valve body 1 by a support 8 and another part movable along the axis of the device and joined to the valve element 2. This regulating means is available in different types and driven by different energies. According to a special embodiment, the valve body 1
A hydraulic power generation set 4 is used which is supported on a tripod bracket 5 which is tightened.

According to another particularly advantageous embodiment, on the one hand the adjustment unit 4
and the support 8 and, on the other hand, the connection between the regulating unit 4 and the valve element 2 are segmented and arranged such that the axes of the segments are perpendicular to each other and to the axis of the device. This special arrangement allows a certain degree of freedom of movement of the valve relative to the axis of the device and also enables a central fixation of the valve relative to the lower part 11 and the upper chamber 12, resulting in a gap between the valve element 2 and the seat 11.12. Improve contact and thus tightness.

in order to direct the flow of gaseous fluid when the valve element 2 is in the outflow or regulated discharge position, and also to protect the regulating means;
Diverging skirts 6, 7 are provided on the valve element 2 and on the support 8.

One skirt 7 is clamped to the valve element 2. The other skirt 6 is clamped to the tripod bracket 5 and the skirt 7 to which the valve element 2 is fixed when the liquid valve is actuated by the regulating means 4
configured to slide inside. The divergent skirt assembly is constructed in such a way that, regardless of the position of the valve element 2, there is always one protective wall between the regulating means and the fluid.

The formation of the skirt is advantageous because the space inside the valve element 2 and the skirt can be ventilated and cooled by forced ventilation means. Such ventilation enhances the thermal protection of the generator set.

In order to protect those areas of the valve arrangement that are exposed to premature deterioration, the upper chamber 11 is further provided with protective measures.

An embodiment of the upper chamber is shown in cross section in FIG. In this embodiment, the bearing surface of the upper chamber 11 is provided with two seals 15 contained in annular grooves 14 formed in the bearing surface of the seat 11. It is also possible to install one or more seals in this way. According to the cross-section of the annular groove 14, the sealing body 15 is in place and in its sealing position the truncated portion 21 of the valve element 2
It protrudes sufficiently from the bearing surface of the upper chamber 11 to receive the bearing surface of the upper chamber 11.

At the location of the flange 3 also a slight inward protrusion is provided with respect to the bearing surface of the upper chamber 11, creating a pressure-reduction zone 19 between this protrusion and the truncated portion 21 of the valve element 2.

In order to ensure cooling of the seat 11, a cooling annular chamber 17 is provided around it, in which the bearing surface of the upper chamber 11 forms a wall,
Cooling fluid can flow inside it.

Furthermore, the upper chamber includes, around the cooling chamber 17, another annular chamber called the injection chamber 18. The injection chamber 18 is connected via a small injection nozzle 13 to the bearing surface of the upper chamber 11 and to the discharge chamber 16 .

The discharge chamber 16 consists of an annular recess located at the inner periphery of the joining plane between the valve body 1 and the 7 flange 3.

The injection nozzles 13 are sealed in the cooling chamber 17 and consist of transverse tube sections, which are distributed over the entire circumference of the upper chamber 11 .

A cleaning plug 20 is provided in alignment with the position of the injection nozzle 13 to access the interior of the injection nozzle 13, and for cleaning purposes, the hole can be unplugged if necessary to clean the bearing surface of the upper chamber 11 or the discharge chamber 16. to flow out.

The injection means assembly, i.e. the injection chamber 18, the injection nozzle 13 and the discharge chamber 16, is used to eject a discharge fluid, such as air, steam or nitrogen, as soon as the valve leaves the upper chamber.

The ejection of the discharged fluid, together with the configuration of the upper chamber 11, is designed to prevent contamination and wear of the bearing surfaces and to maintain a tight seal. Indeed, on the one hand, the discharge fluid cleans deposits that tend to form on the bearing surfaces, and on the other hand, because of the discharge chamber 16, it prevents the gaseous fluid flowing from the valve arrangement from coming into contact with the bearing surfaces of the upper chamber 11. Create a "layer" of "clean" fluid that

〔Effect of the invention〕

It is clear from the above description that the valve arrangement according to the invention offers numerous advantages, both in terms of its function and structure. Separation of isolation function and regulation distribution function is an important element of long-term durability and airtightness.

When the valve is in a safe position, the sealing material can be replaced in a completely safe manner. Such an intervention is possible even if the line is pressurized, since the water coupling can be constructed by fitting the valve appropriately.

Valve device with removable modular elements.

The simple structure is easy and economical to manufacture and install. Furthermore, the overall dimension perpendicular to the axis of the device can be reduced to substantially the circumference of the valve body, with no elements protruding from this circumference. □The application of the various adjustment means is particularly simple, and the various applications of the device depending on the characteristics of the fluid line are also simple. In particular, the materials constituting the body 1, the biconical valve element 2, the separator upper dust 11 and the skirt 6.7 can be of various properties, such as machine-welded steel, cast iron steel, alloys, composites or other materials. be. The cooling of the valve element and the upper chamber, together with the protection by the ejected fluid, can be employed in a number of ways by the skilled worker without departing from the scope of the invention.

The valve device finds many uses in all industries that use gaseous fluid lines, such as gas, steam, etc. supply systems.

The device is used in particular in the steel industry for degassing blast furnace throats during programmed interventions.

[Brief explanation of drawings]

FIG. 1 is a schematic axial sectional view of a valve device according to the invention. FIG. 2 is a partial axial cross-sectional view of the device, detailing the design of the upper chamber. FIG. 3 is a schematic diagram showing the various functional positions of the valve. 3a: Isolation position 3b: Outflow position 3C: Adjusted discharge position 3d; Safety position 1...valve body, 2...valve element, 3...flange,
4...word and circumference arrangement unit, 5...31! II Bracket, 6.7...Skirt, End...Support part, 11...
Upper dust, 12... Lower dust, 13... Injection nozzle, 1
4... Annular groove, 15... Sealing body, 16... Discharge chamber, 17... Cooling chamber, 18... Injection chamber, 20... Clean plug, 19... Decompression area.

Claims (12)

[Claims] (1) includes a valve element movable along an axis inside a valve body, such that a bearing surface of the valve strictly separates a region located downstream of the device from a region located upstream of the device; sealing, draining, and draining of gaseous fluid conduits of the type in which the valve body is provided with a sealing seat on which the valve element can be placed, and further comprising adjustment means suitable for moving the valve element into position and holding it there; A discharge regulating valve device, wherein the valve body further includes a second seat located opposite the sealing seat, the valve element being selectively adjusted by the adjusting means, the device and the line in which it is installed. In addition to the position in which the bearing surface of the valve element rests on the sealing seat, the bearing surface of the valve element rests on the sealing seat, as well as the position of the bearing surface of the valve element to provide a maximum flow section between the valve element and the valve body for conduit outflow. an intermediate position between the seats, in which another face of the valve cooperates with a second seat such that said intermediate position and the valve element rest on the second seat; a versatile outflow valve characterized in that the valve element is held in a selected position between the valve element and the second seat to limit the flow section between the valve element and the second seat and thus regulate the discharge of the conduit. Device. (2) The sealing seat is located on the side of the equipment farthest from the conduit, and the second
A seat is located on the side of the device closest to the conduit, and the valve element is adjustable to rest on a second seat for isolating the conduit from the first seat. A versatile outflow valve device according to scope 1. (3) the valve element comprises two inverted truncated male portions joined by a maximum diameter, the seat of the valve body likewise being substantially conical and conical of the corresponding truncated portion of the valve element; truncated from identical cones and joined at the same maximum diameter, so that when the valve element is in a position intermediate between the two seats, the valve body and the valve element are opposite to the conduit in which the device is installed. 2. A versatile outflow valve arrangement as claimed in claim 1, characterized in that it provides suitable flow division between the valves. (4) The first seat is fastened to the body via a flange, and the inner dimensions of the body at the flange allow passage of the valve element when the valve element is attached to and removed from the device. A versatile outflow valve device according to claim 3. (5) Adjustment means are provided to achieve the movement, positioning of the valve element, the means being connected to the valve body by means of a fixed part and a fixed part movable along the axis of the device and connected to the valve element. and separate parts, the valve element being segmented at its junction with the first adjustment means and second with the support, such that the axes of the segments are at right angles to each other and also at right angles to the axis of the device. A versatile outflow valve arrangement according to claim 1, characterized in that it is arranged in a. (6) A multi-purpose outflow valve device according to claim 5, characterized in that the adjustment means comprises a hydraulic power generation set and is supported by a three-legged bracket fastened to the valve body. (7) the device includes a diverging skirt arranged to direct the flow of gaseous fluid and protect the regulating means when the valve is in the outflow or regulated evacuation position, the skirt supporting the valve element; 6. A versatile outflow valve arrangement as claimed in claim 5, characterized in that the two parts are respectively fixed and one is slidable into the other during displacement of the valve element. (8) A versatile outflow valve arrangement according to claim 3, characterized in that the first seat is equipped with a seal contained in an annular groove provided in its bearing surface. (9) The multi-purpose outflow valve device according to claim 4, characterized in that the first seat is provided around its periphery with a cooling annular chamber into which a cooling fluid can flow. (10) At the position of the bearing surface of the first seat, the first seat is provided with means for discharging a protective fluid, and the means are distributed over the circumference of the seat. A versatile outflow valve arrangement according to claim 9. (11) The means for discharging the protective fluid comprises an annular injection chamber arranged around the cooling chamber, which injection chamber firstly contacts the bearing surface of the first seat through a minute injection nozzle; 11. The multi-purpose outflow valve device according to claim 10, wherein the multi-purpose outflow valve device is connected to a discharge chamber formed by an annular recess provided at an inner circumferential position of the joint surface of the valve body and the flange. (12) A multi-purpose outflow valve device according to claim 7, characterized in that forced ventilation means are provided inside the diverging skirt.